Setup

beginner concepts

Radiant GI (Built-in) · Core Concepts

Detailed setup instructions for Radiant GI on the Built-in Rendering Pipeline.

Rendering path: Radiant GI works with both Forward and Deferred rendering paths. Deferred is strongly recommended because it provides albedo and specular g-buffer data for more accurate indirect lighting. In Forward mode, dark objects may appear “whitish” — use the Luma Influence setting to compensate.

Project Configuration

  1. Open Edit → Project Settings → Graphics
  2. Confirm the rendering path is set to Deferred (recommended) or Forward
  3. If using Deferred, ensure your camera’s rendering path is also set to Deferred (or “Use Graphics Settings”)

Scene Setup

1. Create a Radiant Volume

Go to GameObject → Create Other → Radiant GI → Radiant Volume. This creates a volume that holds all GI settings.

2. Configure the Volume Profile

Select the Radiant Volume and either:

  • Click New to create a fresh profile, or
  • Click Load to use one of the included presets from Assets/RadiantGI/Profiles/

3. Add the Camera Component

Select your camera and add the Radiant Global Illumination script via Add Component.

Volume Modes

ModeDescription
Global Affects the entire scene. Only one global volume should be active at a time.
Local Restricts GI to the volume bounds. Scale the GameObject to define the area. A wireframe box shows the covered region in the Scene view. Useful for interior rooms or specific zones.
Tip: Use multiple Local volumes with different settings to fine-tune GI per area (e.g., brighter interiors, subtler outdoors).

Video Tutorial

Setup & Overview

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